Filtering apparatus.



A. MCDONALD & A. BROWN-DUMB. PILTERING APPARATUS. APPLICATION FILED JAN.21, 1910.

1,006,253, Patented Oct. 17, 1911.

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ARCHIBALD MCDONALD, 0F HENLEY, NEAR DUNEDIN, AND ALEXANDER BROWN- DURIE,OF DUNEDIN, NEW ZEALAND.

FILTERING APPARATUS.

Application filed January 21, 1910.

Specification of Letters Patent.

Patented Oct. 17, 1911.

Serial No. 539,376.

To all whom it may concern:

Be it known that we, ARornBALD Mo- DONALD, farmer, and .ALEXANDER BnowN-DURIE, solicitor, both subjects of His Majesty the King of GreatBritain, and reading, respectively, at Henley, near Dunedin, and atPrinces street, Dunedin, in the British Dominion of New Zealand, haveinvented certain new and useful Improvements in Filtering Apparatus; andwe declare the following to be a full specification of the same.

The object of the invention is to make an eflicient filtering apparatus,which, though primarily intended for milk, is obviously adapted forother liquids for separating sediment from them.

Hitherto the strainers generally strain downward, or so that anysediment remains on the straining surface, not only choking it, but onadding liquid, the sediment often is broken up and much graduallypassesthrough. l/Ve make a receptacle of convenient shape, preferably asshown, but in any case, one in which an upright filtering diaphragm isso placed that two compartments are formed, into one of which, liquid ispoured and through which it percolates to the other compartment, fromwhich it is drawn ofi.

The liquid is poured on a baffle plate arranged to prevent thedisturbance of any sediment after it has settled. Just behind thisdiaphragm, in the receiving compartment, a sediment well is formed underthe bottom, with a long narrow entrance from the bottom to it. This wellis preferably of circular section as being easier to clean which is doneby the removal of screw plugs.

Referring to the accompanying drawingz-Figure 1 is a longitudinalsection of the apparatus with the tap in elevation and Fig. 2 is a planof same with the battle protecting plate removed. Fig. 3 is an elevationof the filtering partition or diaphragm, removable for easy cleaning.

A is the receiving compartment and A the storage compartment for thefiltered liquid.

A is the floor of both compartments.

B is the guide frame of V section secured to, or part of, the sides andfloor, dividing the receptacle into the two compartments abovespecified.

C is the sediment well, located beneath and open to the floor A at theslot C and further provided with screw plugs C 0 D D is a protecting orbaflie plate a little way from, but covering the filtering surface andthe floor of the receiving compartment and closer to these at the outerends than at the angle of juncture, the portionD connecting the lowerportion D with the top D The top portion D of plate D may be extendedover compartment A to prevent liquid inadvertently being poured therebut it should be sufliciently high for ventilation. The plates D and Dfit closely at their sides to the sides of compartment A, but leave aspace at the outer end D around which the liquid flows freely.

D is a convenient handle for removing the baffle bodily from thereceptacle.

E is the removable skelton-frame carrying the filtering diaphragm andprovided with longitudinally grooved sides and bottom to slide intoouter frame B. The top rail and strengthening bars E E of said frame Eare plain. This is covered with metallic gauze, flannel, blotting paperor other known substance for filtering and may have hooks E E to clipthe edges to prevent bulging.

F F are feet keeping the well C off the ground and allowing forventilation under the bottom.

G is a tap for drawing 01f the liquid, from end A. When tap G is closedand liquid poured into compartment A, it falls on plate D and runsaround end D and over the floor A allowing any sediment to get into thewell C through slot G As the liquid rises it filters into compartment Auntil its level in both compartments is the same. When any liquid isdrawn off by tap G the filtering begins afresh. WVhen fresh liquid isadded, it washes any sediment from the filtering diaphragm and samefalls into the well C, so that the said diaphragm is always clean whilethe sediment remains undisturbed in well C. We believe the filteringdiaphragm should be as upright as possible.

In this invention any suitable sizes, materials or shapes ofcompartments may be adopted.

l/Ve claim as our invention 1. In a filtering apparatus, the combinationof a receptacle; a vertical filtering diaphragm arranged in saidreceptacle and extending transversely thereacross, to divide the sameinto juxtaposed receiving and storage compartments; a sediment wellarranged beneath the floor of said receiving compartment, said floorbeing formed with a transverse slot located at the foot of saiddiaphragm and constituting the entrance to said well and a bafiilecomprising an inclined lower portion disposed within the receivingcompartment, an upper portion extending across the top of the storagecompartment, and an intermediate vertical portion con necting said upperand lower portions and arranged within said receiving compartment infront of said diaphragm.

2. In a filtering apparatus, the combination of a receptacle; a verticalfiltering diaphragm arranged in said receptacle and extendingtransversely thereacross, to divide the same into juxtaposed receivingand storage compartments; and a battle comprising an inclined lowerportion disposed within the receiving compartment, an upper portionextending across the top ofthe storage compartment, and an intermediatevertical portion connecting said upper and lower portions, and arrangedwithin said receiving compartment in front of said diaphragm.

In testimony whereof, we hereby afiix our signatures, in presence of twowitnesses.

ARGHIBALD MoDONALD. ALEXANDER BROWN-DURIE.

itnesses KEN'roN MAULAY-DABLY, THos. FRASER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

